[Web Payments] Add a mechanism to build item lists in the PR dialog.

components/payments/payment_request.h

Index: components/payments/payment_request.h
diff --git a/components/payments/payment_request.h b/components/payments/payment_request.h
index a2caab97efc406552fd2438d0f4e1817e0d26f92..e48c4c6a09e3fb05fd1e4e3ed64453a959742471 100644
--- a/components/payments/payment_request.h
+++ b/components/payments/payment_request.h
@@ -90,10 +90,14 @@ class PaymentRequest : payments::mojom::PaymentRequest {
     selected_contact_profile_ = profile;
   }
 
+  const std::vector<autofill::CreditCard*> credit_cards();

[please use gerrit instead, 2017/02/14 00:29:14]

Please add a "&" (ref) to avoid copying the vector.

[anthonyvd, 2017/02/22 20:15:21]

Done.

+
   // Returns the currently selected credit card for this PaymentRequest flow.
   // It's not guaranteed to be complete. Returns nullptr if there is no selected
   // card.
-  autofill::CreditCard* GetCurrentlySelectedCreditCard();
+  autofill::CreditCard* selected_credit_card() {
+    return selected_credit_card_;
+  }
 
   payments::mojom::PaymentDetails* details() { return details_.get(); }
   content::WebContents* web_contents() { return web_contents_; }
@@ -103,7 +107,8 @@ class PaymentRequest : payments::mojom::PaymentRequest {
   // and stores copies of them, owned by this Request, in profile_cache_.
   void PopulateProfileCache();
 
-  // Sets the default values for the selected Shipping and Contact profiles.
+  // Sets the default values for the selected Shipping and Contact profiles, as
+  // well as the selected Credit Card.
   void SetDefaultProfileSelections();
 
   content::WebContents* web_contents_;
@@ -123,6 +128,7 @@ class PaymentRequest : payments::mojom::PaymentRequest {
   std::vector<autofill::AutofillProfile*> contact_profiles_;
   autofill::AutofillProfile* selected_shipping_profile_;
   autofill::AutofillProfile* selected_contact_profile_;
+  autofill::CreditCard* selected_credit_card_;
 
   DISALLOW_COPY_AND_ASSIGN(PaymentRequest);
 };